Azure AD Password Sync Error with Event ID 611

Recently we faced an issue with the Password Sync from our On-Prem AD server . The strange issue was when we create/delete an AD object the synchronization completes successfully except for the Password changes. In the event viewer on the AAD connect server we could see event ID 611.

Password synchronization failed for domain: test.com

Details:System.DirectoryServices.Protocols.LdapException: The operation was aborted because the client side timeout limit was exceeded.

If you are facing the same issue , you need to modify the registy entry on the AAD connect server as below;

HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Ldap

Modify the parameter LdapClientIntegrity to 0.

But I am still not sure , is it a Bug or not, If I come across any information about the cause of the error , I will update this post accordingly.